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Though the permissions on an Exchange mailbox usually belong to a single account, different accounts can have a variety of permissions suitable for their tasks. For instance, when a mailbox user leaves the organization, it does not mean that its data is no longer useful. The administrator may change the permissions of that mailbox and give access to other users in different ways. For example, permissions are required for another user to send emails on behalf of another employee, so they need to be given mailbox permissions.
You can grant another user read/write access to a mailbox using mailbox permissions. A user can get the ability to read emails from the mailbox, send emails on another user’s behalf, and send emails that appear to have come from that mailbox.
So, there are three types of permissions-
All three permissions can be assigned to the active users in the organization that have Exchange Online accounts, and there are two methods to assign such permissions-
In the Admin Center, you can set the permissions on specific mailboxes individually. Follow the steps-
You can use PowerShell to assign mailbox permissions easily.
The example assigns the complete permissions of John Price’s mailbox to Patrick. both methods would help you in understanding different admin roles in Office 365 and how it affect the mailbox usage and its function.
Many users who were previously using Exchange on-premises have switched to Exchange Online cloud (Office 365) now. However, it is not a simple operation, particularly if you plan to manually migrate the entire Exchange infrastructure to Office 365.
Fortunately, Kernel Office 365 migration software is here to help you. It can access all mailboxes from on-premises Exchange and move them to Exchange Online accounts. It will take care of the entire migration process to migrate all the mailboxes and other data.